scholarly journals Zerovalent Iron Modulates the Influence of Arsenic-Contaminated Soil on Growth, Yield and Grain Quality of Rice

Stresses ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 90-104
Author(s):  
Sanjida Akter ◽  
Golum Kibria Muhammad Mustafizur Rahman ◽  
Mirza Hasanuzzaman ◽  
Zakaria Alam ◽  
Toshihiro Watanabe ◽  
...  
Keyword(s):  
Contaminated Soils ◽  
Grain Quality ◽  
Oryza Sativa L ◽  
Growth Yield ◽  
Zerovalent Iron ◽  
Dependent Manner ◽  
Rice Grains ◽  
Randomized Design ◽  
Dose Dependent

This study aimed to investigate the effects of zerovalent iron (ZVI/Fe0) on growth, yield and grain quality of rice (Oryza sativa L.) cv. BRRI dhan49 in arsenic (As)-contaminated soils. The pot experiment was arranged in a complete randomized design (CRD). The treatments on rice applied were As in soils at As0 (0 mg kg−1), As20 (20 mg kg−1), and As40 (40 mg kg−1) with a combination of ZVI at ZVI0 (0%), ZVI0.5 (0.5%), ZVI1.0 (1.0%), and ZVI1.5 (1.5%) with three replications. Contents of phosphorus (P), potassium (K), manganese (Mn), zinc (Zn), iron (Fe), and As in grains of rice; and Fe and As content in cultivated soils were determined. The application of ZVI had negative or no effect on shoot weight, tiller number, and grain yield. Although application of ZVI had little or no effect on thousand grain weight, P, K, Zn, and Mn of rice grains, Fe content in rice grains was increased by ZVI treatments in a dose-dependent manner. The grain As content was non-significantly reduced by the ZVI application. Soil bacterial population was negatively influenced by the ZVI in a dose-dependent manner which might be linked with As content in the soils. Therefore, a further elaborative study is needed to elucidate the mechanisms of the effects of ZVI and soil As on rice and rhizosphere soil microorganisms.

scholarly journals The Role of Estrogens in Rheumatoid Arthritis Physiopathology

2020 ◽  
Author(s):  
Maria Fernanda Romo-García ◽  
Martín Zapata-Zuñiga ◽  
José Antonio Enciso-Moreno ◽  
Julio Enrique Castañeda-Delgado
Keyword(s):  
Rheumatoid Arthritis ◽  
Direct Action ◽  
Hormone Replacement ◽  
Joint Disease ◽  
Dependent Manner ◽  
Sexual Hormones ◽  
Dose Dependent ◽  
Estrogen Administration

Rheumatoid arthritis (RA) is a chronic, inflammatory joint disease that can lead to irreversible disability. It affects women in a higher proportion than men (3:1 cases). Several reports suggest a link between female sexual hormones (estrogens) and RA features. It’s been described that biological processes where basal estrogen levels are altered like in menstruation, pregnancy, and menopause modifies RA onset, flare, disease severity, and inflammation. Estrogens have a direct action upon the immune system though ERα and ERβ receptors, which have distinct affinity to estrogen concentrations and modifications and have effects upon RA in a dose and receptor dependent manner. The studies focused on dose dependent response at experimental settings reveal a wide (from 25 pg/L to several μg/L) and even contradictory spectrum of effects in patients and cells. This chapter summarizes the contributions and effects of estrogens in RA physiopathology, clinical features, and discusses the possible contributions of estrogen administration and concentration of hormone replacement therapy (HRT) to improve the quality of life and reduce the symptoms of RA patients based on the knowledge of the biology of these hormones.

Effects of ambient gaseous pollutants on photosynthesis, growth, yield and grain quality of selected crops grown at different sites varying in pollution levels

2016 ◽  
Vol 62 (9) ◽  
pp. 1195-1207 ◽  
Author(s):  
Muhammad Adrees ◽  
Farhan Saleem ◽  
Fariha Jabeen ◽  
Muhammad Rizwan ◽  
Shafaqat Ali ◽  
...  
Keyword(s):  
Grain Quality ◽  
Growth Yield ◽  
Gaseous Pollutants ◽  
Pollution Levels

scholarly journals Agronomic Management and Rice Varieties Controlling Cd Bioaccumulation in Rice

2019 ◽  
Vol 16 (13) ◽  
pp. 2376 ◽  
Author(s):  
Liangmei Chen ◽  
Wenge Wu ◽  
Fengxiang Han ◽  
Jiangxia Li ◽  
Wenling Ye ◽  
...  
Keyword(s):  
Grain Quality ◽  
Rice Varieties ◽  
Cd Accumulation ◽  
Safety Standards ◽  
Average Decrease ◽  
Rice Grains ◽  
Agronomic Management ◽  
Rice Yields ◽  
Selection Of

Selection of rice varieties and application of amendments are effective measures to ensure food safety. Here we report that in the non-Cd area, the grain quality of all rice varieties met the Chinese National Grain Safety Standards (CNGSS). In the high-Cd area, rice varieties showed significant different bioaccumulation of Cd with lower rice yields than those in non-Cd area with the average decrease of 31.1%. There was a negative correlation between grain Cd content and yields. A total of 19 rice varieties were selected as low Cd accumulating rice varieties and their Cd content met CNGSS in the low-Cd area. Six of them met CNGSS in the high-Cd area. The application of amendments significantly reduced Cd content in rice grains by 1.0–84.7% with an average of 52.6% and 13 of varieties met CNGSS. The amendments reduced available Cd content in soils by 1.1–75.8% but had no significant effects on rice yields. Therefore, the current study implied that proper agronomic management with selection of rice varieties and soil amendments was essential in controlling Cd accumulation in rice grains.

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